Sinthani TIFF ku PNG

Amapepuka, nthawi zonse, kukhala chithunzi chimodzi chophatikizidwa. Momwe zimaphatikizidwa, masks, ma layers osinthika ndi mawu osasinthika onse amatulutsidwa ku pixels omaliza chifukwa PNG sichimakhala ndi chilengedwe chokhala nawo. Tengani TIFF ngati wogwira ntchito wamkulu ndipo gwiritsani ntchito PNG mwakhama ngati kutumiza kunja. TIFF imagwira ntchito ndi CMYK, 16-bit deepness, embedded ICC profiles ndi multi-page documents, zomwe ndi zomwe zimafunikira zosindikiza ndi zosunga zobwezeretsera. PNG ndi woipa chithunzi mtundu: chithunzi anapulumutsidwa monga PNG ndi routinely asanu mpaka makumi asanu nthawi yaing'ono kuposa chithunzi chimodzimodzi monga JPG kapena WebP.

Imakhala yosinthidwa kukhala sRGB, chifukwa PNG siyimakhala ndi njira ya CMYK. Pogwiritsa ntchito chophimba, izi ndi zomwe mukufuna. Pogwiritsa ntchito chophimba cha malonda, sichingakhale choncho — kusintha kwa gamut kumasintha momwe mabala osatumizirana amawonekera pa chophimba, choncho itumiza chophimba cha TIFF choyambirira kuposa PNG.

Popanda malire, yeah, komweko TIFF ndi Tagged Image File Format kuchokera 1986, ndipo ndi mtundu wa skanning, kufalitsa ndi archiving makampani standardized pa.

Palibe pixel deta, palibe. Both formats kusungira chithunzi popanda lossy kusamvana, kotero chithunzi chimene chimatuluka ndi yofanana ndi imodzi yomwe inapita mu ndi kusintha angagwiritsidwe ntchito mobwerezabwereza. zimene kusintha ndi kukula kwa fayilo, ndi zimene ntchito kuyenda - kuwala m'lifupi, embedded profiles, ma layers ndi animation onse anathandiza mosiyana pakati lossless mtundu.

Kuwala kwamkati kumapezeka pamene PNG ndi PNG, WebP, TIFF, GIF, kapena SVG. Kusintha kuti JPG kumadula nyanja ya alpha pazenera lofiira. Ngati mukufuna kuwala kwamkati m'chithunzicho, dinani pa PNG yokhala ndi kuwala kwamkati m'malo mwa PNG=JPG. PNG anapangidwa mu 1996 monga patent-free kuchotsa kwa GIF, ndi anayamba webusaiti default lossless chithunzi mtundu.

Ma profiles a ICC a ICC amawerengedwa kuchokera ku TIFF ndipo amaphatikizidwanso ku PNG komwe mtundu umathandizira (JPG, PNG, TIFF, WebP). Ma formats osagwirizana ndi ma profiles amabwerera ku sRGB, zomwe zimasunga mitundu yogwirizana ndi ma displays ambiri amakono.

EXIF ya kamera (ISO, shutter, lens, GPS coords) imasungidwa mwanjira yosasinthika pa TIFF → PNG pamene mitundu iwiri imathandizira metadata. Pezani njira yosatsegulira kuti muchepetse metadata panthawi yotsitsa ngati mukufuna kugawana zithunzi popanda kuwonetsetsa kuti zili pamalo oyenera.

Inde - timangoyika mafayilo ambiri a TIFF ku gawo lotsitsa ndipo timawaika m'gulu limodzi. Ogwiritsa ntchito aulere amalandira 100 MB pa fayilo; Premium siyimakhala ndi fayilo ya fayilo ndipo imagwira ntchito zambiri, chifukwa chake 200-image batch imakhala yomaliza m'maola awiri.

Kuti tisinthe mtundu woyenera timagwiritsa ntchito njira yofanana ya libpng / libjpeg-turbo / libwebp / ImageMagick yomwe wolemba desiki amagwiritsa ntchito, ndi mtundu wofanana wa zotsatira. Kusiyana ndi kuwongolera kwa mayunitsi ozungulira - mapulogalamu a desiki amatsegula fayilo imodzi panthawi imodzi; timavomereza mayunitsi.

Choyambirira ndi 1:1 — PNG yanu imasunga kukula kwa pixels ya chiyambi TIFF. Ngati mukufuna kusintha kukula kwa chithunzi ngati gawo la kusintha, kugwiritsa ntchito /resize-image/ pambuyo posintha, kapena kugwirizana ndi /image-resize/ ntchito.

Kwa JPG / WebP, mtundu wa 75-85 umapeza PNG 60-80% wamtali kuposa TIFF popanda kuwonekera panthawi yowonera. Kwa PNG yopanda malire (PNG, TIFF), mutha kuyembekezera kupulumutsa pang'ono - nthawi zambiri 5-30% pogwiritsa ntchito kutsitsa bwino / LZW. PNG ndi kusankha koyenera kwa zithunzi, malogo, line art ndi chilichonse ndi zosalimba mapiko kapena kuwala - palibe kuyimba, palibe kuwala band.